Caps/Resistors/wah mod


ericthecableguy
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Joined: 07/09/05
Posts: 1,929
ericthecableguy
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Joined: 07/09/05
Posts: 1,929
09/20/2006 1:32 am
Hey, another thread here from me...

Just a couple quick questions;
I want to mod my gcb-90 crybaby cause it's quite boring and has little sweep.
Wondering ...

a)What types of resistors do i need? I went on the radio shack site, and some of them are metal-oxide, some carbon and different wattage values- does it matter what wattage you use?

b)What types of caps to use. In a circuit like this...

The 'Sweep cap' uses a weird blue capacitor. Is this a special type? Or can i just use a normal cap, like from the value pack I bought.

Help is appreciated as always. Thanks guys. :)
For life is quite absurd and death's the final word, You must always face the curtain with a bow
Forget about your sin - give the audience a grin
Enjoy it - it's your last chance anyhow.

METOOB
# 1
Lordathestrings
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Joined: 01/18/01
Posts: 6,242
Lordathestrings
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Joined: 01/18/01
Posts: 6,242
09/20/2006 2:13 am
I recommend metal film resistors here, rather than carbon composition, because they generate less noise. You're dealing with very small voltages and currents, so power rating is not critical - 1/4 W is plenty.

Some cork-sniffer conoiseurs get their panties in a bunch about the tonal properties of various capacitor materials, but that ain't me. You will probably find ceramic caps are easiest to find in that value - good enough. You could try polycarbonate or polystyrene caps if you want, but I doubt very much you will hear any change from one type to another. These different materials do have measurably different characteristics - at Radio Frequencies. For audio use, no difference.
Lordathestrings
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# 2
ericthecableguy
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ericthecableguy
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09/20/2006 2:45 am
Thanks alot sir...one more thing.

What does a value like 1K7 mean?
For life is quite absurd and death's the final word, You must always face the curtain with a bow
Forget about your sin - give the audience a grin
Enjoy it - it's your last chance anyhow.

METOOB
# 3
Lordathestrings
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Joined: 01/18/01
Posts: 6,242
Lordathestrings
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Posts: 6,242
09/20/2006 3:07 am
That's a way to ensure accurate understanding of component values. A decimal point is very important, but it can be overlooked or omitted, so the value is written with the multiplier positioned where the decimal point would be.

The letter "k" means 1000, so "1k7" would be 1.7 x 1000 = 1700 Ohms, or 1.7 k Ohms.

The letter "M" means 1,000,000, so "5M6" would mean 5.6 Meg, or 5,600,000 Ohms.
Lordathestrings
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www.GuitarTricks.com - Home of Online Guitar Lessons
# 4
ericthecableguy
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Posts: 1,929
ericthecableguy
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09/20/2006 10:04 pm
Thankyou very much. :)
For life is quite absurd and death's the final word, You must always face the curtain with a bow
Forget about your sin - give the audience a grin
Enjoy it - it's your last chance anyhow.

METOOB
# 5

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